That's the point, nothing has changed drastically.

Nearly all injectors will run 25% more power than standard. How many cars do you know where the first thing you have to do when tuning is upgrade the injectors? The increase in capacity is about 11% so the injectors are well capable of handling it. I know that people have run in excess of 150bhp with standard injectors so I think the sub 130bhp expected isn't going to be a problem.

The thing is that I know for a fact this works, I've seen exactly the same problem before and it was solved by fitting 1.8 injectors.